More than 12 million people are under a heat advisory in the Pacific Northwest as temperatures through the weekend are expected to climb nearly 20 degrees higher than normal, with the extreme weather extending into Canada as the country contends with dozens of wildfires.
National Weather Service forecasters said an abnormal area of high pressure will build a “heat dome” over the western United States and Canada, acting like a lid over the atmosphere, bringing clear skies and allowing temperatures to rise.
“Temperatures in the Pacific Northwest will experience highs in the 80s and 90s, which will represent 20-30+ degree anomalies,” […]
Click here to visit source. www.nytimes.com